TOI-763
TOI-763 is the bright star to the left of the galaxy NGC 4832 in this image. | |
Location of TOI-763 in the night sky. The general location of the star is marked within the red square. | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 12h 57m 52.447s[1] |
| Declination | −39° 45′ 27.71″[1] |
| Apparent magnitude (V) | 10.28[2] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | G[3] |
| Astrometry | |
| Radial velocity (Rv) | −13.82±0.16[1] km/s |
| Proper motion (μ) | RA: -76.744 mas/yr[1] Dec.: -84.721 mas/yr[1] |
| Parallax (π) | 10.4655±0.0183 mas[1] |
| Distance | 311.6 ± 0.5 ly (95.6 ± 0.2 pc) |
| Details[3] | |
| Mass | 0.917±0.028 M☉ |
| Radius | 0.897±0.013 R☉ |
| Surface gravity (log g) | 4.45±0.05 cgs |
| Temperature | 5,450±60 K |
| Metallicity [Fe/H] | +0.01±0.05 dex |
| Rotation | 27±16 days |
| Other designations | |
| CD−39 7945, TOI-763, TIC 178819686, 2MASS J12575245-3945275[2] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
TOI-763 is a single high proper motion G-type star in the constellation of Centaurus, near the galaxy NGC 4832 in the sky.[2] It is approximately 0.9 times the mass and radius of the Sun, with a surface temperature of 5,450±60 K and a spectral type of G7.[4] TOI-763 is too faint to be visible to the naked eye. Based upon parallax measurements, it is located 312 light-years (95.6 parsecs) in distance from the Sun. The object is drifting towards the Sun with a radial velocity of −13.8 km/s.[1]
Planetary system
In August of 2020, two exoplanets were identified via the transit method of exoplanet detection by the Transiting Exoplanet Survey Satellite (TESS), a space telescope for NASA's Explorer program, designed to search for exoplanets. A third candidate planet is suspected based on radial velocity observations.[3]
Neither of these two planets orbit in the habitable zone and are both believed to be sub-Neptune planets.[5]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 9.79±0.78 M🜨 | 0.0600±0.0006 | 5.6057±0.0013 | 0.04+0.04 −0.03 |
— | 2.28±0.11 R🜨 |
| c | 9.32±1.02 M🜨 | 0.1011±0.0010 | 12.2737+0.0053 −0.0077 |
0.04+0.04 −0.03 |
— | 2.63±0.12 R🜨 |
| d (unconfirmed) | ≥9.54±1.59 M🜨 | 0.2504+0.0093 −0.0105 |
47.7991±2.7399 | ~0 | — | — |
See also
References
- ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c "CD-39 7945". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2025-04-25.
- ^ a b c d e Fridlund, M; Livingston, J; Gandolfi, D; Persson, C M; Lam, K W F; Stassun, K G; Hellier, C; Korth, J; Hatzes, A P; Malavolta, L; Luque, R; Redfield, S; Guenther, E W; Albrecht, S; Barragan, O (2020-10-01). "The TOI-763 system: sub-Neptunes orbiting a Sun-like star". Monthly Notices of the Royal Astronomical Society. 498 (3): 4503–4517. arXiv:2008.12535. Bibcode:2020MNRAS.498.4503F. doi:10.1093/mnras/staa2502. ISSN 0035-8711.
- ^ "TOI-763". www.exoplanetkyoto.org. Retrieved 2025-04-25.
- ^ "TOI-763 c - NASA Science". 2020-09-24. Retrieved 2025-04-25.